Thanks Stitch! 99% of the eye candy comes for free with the NWN toolset. Its all drag and drop. If you have NWN, you have the toolset if you are interested in seeing what you can do without writing any code.

Additionally, all of the code written by Bioware for the offical campain is available for use.

For scripting, check out http://www.reapers.org/nwn/reference

Its an excellent resource from tutorials to a quick reference.